DIN EN 60793-1-54:2013-07

This part of IEC 60793 outlines a method for measuring the steady state response of optical fibres and optical cables exposed to gamma radiation. It serves to determine the level of radiation induced attenuation produced in single-mode or Class A, category A1 and A2 multimode optical fibres, in either cabled or uncabled form. The attenuation of optical fibres by gamma radiation is primarily due to the trapping of radiolytic electrons and holes at defect sites in the glass. This test procedure specified in this International Standard focuses on two regimes of interest: the low dose rate regime suitable for estimating the effect of environmental background radiation, and the high dose rate regime suitable for estimating the effect of adverse nuclear environments. Attention is drawn to the fact that strict regulations and suitable protective facilities are to be adopted in the laboratory for this test. Carefully selected trained personnel shall be used to perform this test. The responsible committee is Subcommittee DKE/UK 412.6 "Lichtwellenleiter und Lichtwellenleiterkabel" ("Fibres and cables") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.